Current Tender

Tender 0510024580

Rehabilitation of Maintenance Holes on SWSOOS

  • Date advertised:
    18 April 2013
  • Closing date:
    16 May 2013
  • Rehabilitation of 12 Mainenance Holes on SWSOOS 1 and 2

    Tender closing: Thursday 16 May 2013 at 9:30am

    Contact: Glen Nelson

    Tel: 02 8849 3761

    email: glen.nelson@sydneywater.com.au

    Cost of document: $150.00 (non-refundable)

    The tender documents are available for purchase and downloading from Sydney Water''s nominated website https://tenders.nsw.gov.au/sydneywater

    Background Summary

    Recent traverse inspections on SWSOOS 1 & 2 from the Cooks River Syphon to Malabar STP have identified structural deterioration and access improvements necessary to 12 maintenance holes on these very large sewers. There are a number of deep maintenance holes which have a series of ladders and platforms which make it impossible to lower the equipment and personnel into the sewer for planned maintenance activities. These maintenance holes require rehabilitation to remove the old and dilapidated ladders and platforms some of which are at risk of collapsing into the sewer, install new access arrangements in line with safety regulations and undertake concrete repairs identified in the condition assessment reports.

    maintenance holes require new access covers and old drop pipes replaced.

    The objective of this contract is to internally rehabilitate and make safe the access within ten maintenance holes on SWSOOS1 and two maintenance holes on the SWSOOS2. The depth of the maintenance holes vary between 3m and 43m with six greater than 20m.

    The Scope of work for the rehabilitation and repair work includes:

    Each location has its own specific site requirements which need to be addressed including customers, traffic and environmental considerations. Removal of platforms, where required, for future access and/or rescue.

    Installation of new access ladders, platforms and railings.

    Protection of existing covers or replacement with new multipart covers as indicated in the drawings.

    A traverse to inspect MH37, Howell Ave to determine how this access can be modified to provide access into SWSOOS 1.

    Rehabilitation/repair of deteriorated concrete surfaces.

    Removal of existing corroded step-irons and replace with new step irons

    The contract period shall be 40 weeks